# US 2013/0154626 A1 · Rotation detection device and manufacturing method for the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154626 A1 - Document ID: US20130154626A1 - Status: Published application - Kind: A1 - Application number: 13/616,529 - Filed: 2012-09-14 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Assignees: Denso Corporation - Inventors: Mitsuru Takasaki; Hiroyuki Tsuge - Web page: https://patentgrep.com/patent/US20130154626A1 ## CPC - G01P 3/487: delivered by rotating magnets - G01D 11/245: {Housings for sensors} - G01P 1/026: {for speed measuring devices, e.g. pulse generator} - G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G}) - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR ## Abstract A rotation detector component detects a rotational state of a rotor and sends a rotational detection signal. A signal transmission component is electrically connected with a lead frame of the rotation detector component to transmit the rotational detection signal to an external device. A body portion holds the rotation detector component and a part of the signal transmission component. The body portion is integrally molded of a first resin to cover a joint portion between the lead frame and the signal transmission component, the rotation detector component, and a part of the signal transmission component. The rotation detector component has corners including at least two exposed corners, which are exposed from the body portion. ## Claims ### Claim 1 A rotation detection device comprising: a rotation detector component configured to detect a rotational state of a rotor and to send a rotational detection signal; a signal transmission component electrically connected with a lead frame of the rotation detector component and configured to transmit the rotational detection signal to an external device; and a body portion holding the rotation detector component and a part of the signal transmission component, wherein the body portion is integrally molded of a first resin, after joining the lead frame of the rotation detector component with the signal transmission component to form a joint portion between the lead frame and the signal transmission component, to cover the joint portion, the rotation detector component, and a part of the signal transmission component, and the rotation detector component has a plurality of corners including at least two exposed corners, which are exposed from the body portion. ### Claim 2 (depends on 1) The rotation detection device according to claim 1, wherein the at least two exposed corners are located on a diagonal line of the rotation detector component. ### Claim 3 (depends on 1) The rotation detection device according to claim 1, wherein the at least two exposed corners include all the plurality of corners. ### Claim 4 (depends on 1) The rotation detection device according to claim 1, wherein the rotation detector component is encapsulated, excluding the at least two exposed corners. ### Claim 5 (depends on 1) The rotation detection device according to claim 1, wherein the at least two exposed corners are partially or entirely sheathed with a second resin. ### Claim 6 (depends on 5) The rotation detection device according to claim 5, wherein each of the first resin and the second resin is a thermosetting resin, or a melting point of a thermoplastics resin employed as the first resin is lower than a melting point of a thermoplastics resin employed as the second resin. ### Claim 7 (depends on 1) The rotation detection device according to claim 1, further comprising: a mount portion configured to mount the body portion. ### Claim 8 (depends on 7) The rotation detection device according to claim 7, wherein the mount portion is integrally molded of a third resin to cover: one of a part of the body portion and a part of the signal transmission component; or both of a part of the body portion and a part of the signal transmission component. ### Claim 9 (depends on 7) The rotation detection device according to claim 7, wherein the body portion has an integrally-molded portion, which is integrally molded with the mount portion, and the integrally-molded portion has a cross section, which is partially or entirely in a circular shape or in an ellipse shape. ### Claim 10 A manufacturing method for a rotation detection device, the rotation detection device comprising: a rotation detector component configured to detect a rotational state of a rotor and to send a rotational detection signal; a signal transmission component electrically connected with a lead frame of the rotation detector component and configured to transmit the rotational detection signal to an external device; a body portion holding the rotation detector component and a part of the signal transmission component; and a mount portion configured to mount the body portion, the manufacturing method comprising: joining the lead frame of the rotation detector component with the signal transmission component to form a joint portion between the lead frame and the signal transmission component; and forming the body portion of the first resin by integrally molding the joint portion, the rotation detector component, and a part of the signal transmission component, such that a plurality of corners of the rotation detector component has at least two exposed corners, which are exposed from the body portion. ### Claim 11 (depends on 10) The manufacturing method according to claim 10, further comprising: sheathing partially or entirely the at least two exposed corners with a second resin. ### Claim 12 (depends on 10) The manufacturing method according to claim 10, further comprising: integrally molding the mount portion of a third resin to cover: one of a part of the body portion and a part of the signal transmission component; or both of a part of the body portion and a part of the signal transmission component.